共查询到20条相似文献,搜索用时 31 毫秒
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SOFTWAREEVOLUTIONSoftwareevolutionhasbeenaddressedfrommanyviewpoints .Theseincludemanagementis suessuchaswhichpartsofasystemshouldberebuilt,configurationissuessuchaskeepingtrackofmanyversionsofthesamesystem ,test ingissuessuchasdeterminingwhichtestcases… 相似文献
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INTRODUCTIONManyexperimentalandnumericalstudieshavebeencompletedtoinvestigatetheparticlemotioninturbulence .Previousfluiddynamicsstudieswerecommonlybasedontime averagedReynoldsequations,suchasthetwo equationmodel.Justlikethecarriergasphase,theparti cleph… 相似文献
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《上海大学学报(英文版)》2000,(4)
1 Introduction Withthedevelopmentofthe powerelectronicstechnology ,stationarypowerconvertingdevicessuchasAC DCconvertersandDC ACinvertersareappliedinvariousindustrialareas .However ,thishasledtosomeproblems ,e .g .theincreaseofharmonicsinpowersupply ,andtheEM… 相似文献
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李芳元 《伊犁教育学院学报》2001,14(1):37-39
Colourwordsarewordsusedtodescribethecoloursofdifferentthings.Besidesindicatingtheirspecificcolours,suchasred ,yellow ,blackandwhite ,theyalsoreflectthedifferentculturalconnota tionsindifferentlanguages.Forexample,Chinesegirlslikewearingreddressesontheirwe… 相似文献
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1 Introduction Theadaptivefuzzycontrolisasuccesfulissueofthefuzzycontrol.Theadaptivefuzzycontrolofonlinelearningandonlinecontrolistheorientationofthedevelopmentintheadaptivefuzzycontrolfield.Butthecomplexoftheplantsuchasstrongcoupledrelations,long… 相似文献
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Mohammed Ahmed ZHONG Shun shi 《上海大学学报(英文版)》1999,3(4):279-281
1 Introduction Thesuccessfulcommericalapplicationsofwirelesstechnologydemandappropriateantennas.Typically,adualpolarizationoperationsuchassimultaneousvertialandhorizontalpolarizationantennawithlowprofile,smallsize,andlightweightisrequiredforwidespre… 相似文献
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INTRODUCTIONThesericultureecosystemoftheHang Jia HudistrictinZhejiangProvincehasbeenseri ouslypollutedbyfluoridesince 1 982 .Widelydistributedsilicateindustries,suchasbrick ,ce ramic ,fireproofmaterial,andcementprocessingindustrieswhichmaketheirproductsusingv… 相似文献
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INTRODUCTIONManydatabaseapplications,suchastelecommunicationsindustry ,factoryautoma tion ,requirehighperformanceandreal timeac cesstodata .DRDBs(DiskResidentDatabase) ,however,areinadequatetomeetsuchrequire mentsbecauseofhighdiskaccessoverheadsfordataretrie… 相似文献
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1 Introduction Thefundamentalphysicalmetallurgyofthermomechanicalprocessing(TMP)hasbecomemuchbetterunderstoodoverthelasttwodecades[1~8].ItiswellcommonlyrecognizedthattheminuteadditionofstrongcarbonitrideornitrideformingelementssuchasNb,TiandVtakesveryimp… 相似文献
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《上海大学学报(英文版)》2000,(4)
1 Introduction Longrangeorderedintermetallicspossessanumberofadvantages ,suchaslowdensity ,goodhigh tem peraturestrength ,excellentoxidationresistance ,whichmakeitpossibleforthemtobeusedasstruc turalmaterialsforhightemperatureapplications .However ,mostofthe… 相似文献
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《清华大学教育研究》1995,(Z1)
AComparativeStudyofSomeCommonEnglishandChineseMetaphorsGuoHongyiIntroductionItisgenerallybelievedthatOrientalcultures,suchasC... 相似文献
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陈勇 《思茅师范高等专科学校学报》2002,18(1):82-89
1 .Introduction :Languagelearnersusuallyhavedifficultyintheareaofpragmatics.‘Learnersshowsignificantdif ferencesfromnativespeakersintheexecutionofcer tainspeechacts...’ (Bardovi -Harlig,1 996 ) .Pragmaticsseemstobeanimportantareainforeignlanguagelearning .Chinese… 相似文献
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1 Introduction Variationalinequalitytheoryhasbecomeaveryef fectiveandpowerfultoolforstudyingawiderangeofproblemsarisinginpureandappliedsciencessuchasdifferentialequations ,contactproblemsinelasticity ,controlproblems,generalequilibrium problemsineconomic… 相似文献
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IntroductionResearchesdoneintheareaofspeechacttheorybylinguistsJ.AustinandJ .Searlehavethrownlightonthedevelopmentandformationofcommunicativecompetenceintheteachingofsecondorforeignlanguages.Theirfindingsindicatethatafluentuserofaforeignlanguageshouldn… 相似文献
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INTRODUCTIONSinceitsclinicalintroduction ,extracorporealshockwavelithotripsy(ESWL)hasmaintainedanimportantroleinthemanagementofurinarycalculi.Thesuccessofthistherapeuticproce duredependsontheeffectivedisintegrationandevacuationofstonedebris.However,thest… 相似文献
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INTRODUCTIONEmergencyservices,suchasemergencyin ventorysupply ,emergencymedicalserviceandfirerescuecompriseamajorconcernofemergen cyplanners.Thestrategicproblemofwheretolocateemergencyservicesstations (depots)andthestrategicproblemofthequantityofemergen c… 相似文献
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Ghulam Qasim Mehboob ur Rehman A. Kareem . School of Communication Information Engineering Shanghai University Shanghai China . Gomal University D.I.Kham Pakistan 《上海大学学报(英文版)》2000,4(1):27-30
1 Introduction Anumberoffullwaveanalyseshavebeenproposedinthepasttwodecades[1~3].Theseallpredictthecharacteristicsofmicrostripantennasrigorouslyathigherfrequencies.Thespectraldomainmethodofmoments[3],usingsimplebasisfunctionsrequiresalargesizematrixsuchas(… 相似文献
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INTRODUCTIONMovingjetcontainingsuspensionsincludingcoalpowder,dropletsandsoonwidelyexistsintechnicalapplicationssuchasaircraftusingfuelforpower.LinJianzhongetal.( 2 0 0 0 )whosestudyshowedthattheerosionofwallsofadevicevarieswiththechangeofthecoherentstructu… 相似文献
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1 Introduction UltrafineparticlesofmagneticmaterialssuchasFe,Co,Niandtheiralloyshavethepotentialapplicationsinmagneticrecording,ferrofluids,medicaldiagnosticetc..Themagneticpropertiesoffineparticlesdiffermagnificentlyfromthoseoflargeparticles,andtherelat… 相似文献
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1 Introduction Becauseofthecombinationofanumberoffavorableproperties,suchashighhardness,highcarriermobilityandbreakdownvoltage,largebandgap ,lowdielectricconstant,andtransparencytovisiblelight,IRlightandmicrowaves,etc.[1] ,diamondfilmhasbeenconsider ablyprom… 相似文献